Abstract
In this paper a new method of performance analysis is described based on a multi-timescale decomposition of the acoustic signal. This analysis is sensitive to a variety of expressive devices employed by musical performers including tempo, dynamics, and articulation. The output of the analysis is a hierarchical tree structure that resembles the time-spanreduction of the theory of Lerdahl and Jackendoff. Analyses of percussive performance are demonstrated for a variety of percussive signals. The model that forms the basis of the analytic method also provides an account of the phenomena of rhythmicstreaming whereby a sequence of events differentiated only by loudness can form coherent streams.
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